Bowen's disease

Bowen's disease is a growth of abnormal cells confined to the outer layer of the skin called the epidermis. Hence, Bowen's disease is also called intraepidermal squamous cell carcinoma or squamous cell carcinoma in situ. It usually appears as a flat, red and scaly patch of up to a few centimetres in diameter. Occasionally it can turn into skin cancer so dermatologists usually treat, or at least keep an eye on Bowen's disease.

What causes Bowen's disease?

It is mostly caused by long-term sun exposure. Hence, it is commonly found on sun-exposed sites such as the ears, face, hands and lower legs. Bowen's disease is not infectious or due to an allergy.